As to the experimental study , a test system was designed firstly , which include propellant feed system , cooling system , controlling system and measure system . secondly , a test engine was designed according to the experimental requirement . on this basis , experiments under different working conditions were done , and the results of them were analyzed , which showed the combustion efficiency and stability 实验方面，首先设计了针对三组元发动机推力室工作过程进行试验的试验系统，包括推进剂供应系统与冷却水供应系统、控制系统以及压力、温度、流量的测量采集系统；其次，设计出符合试验要求的缩尺发动机；最后针对所设计的试验系统和发动机，进行了不同工况的试验，对所得数据进行了分析处理，得到了不同工况下燃烧效率和燃烧稳定性特性。
Great difference in pressure for two flow made pressure wave system and it help to extend the delay time for gas in chamber , which increases combustion effusion . second , to increase combustion effusion , the inlet temperature of air and gas should be enhanced in the range of heat releasing in chemical reaction . third , the first work condition is unburned absolutely and the second work condition is burnt in shear layer of inlet and the end of down wall zone in straight segment 对于压力差很大的两股气流,所形成的压缩波系的结构可以增加燃气驻留时间,提高燃烧稳定性;为了提高扩散燃烧的效率,在保证能放热的化学反应温度范围之内,应适当提高燃气及空气的来流入口温度;燃气喷嘴应居于燃烧室轴线上,是改进超音速燃烧室结构的一种思路。
This paper studies the test research systems of key element . such as combustion process test research system . combustion instabi1ity test research system , nozzle test research system , heat transfer and cooling test research system , and also sets up the building scheme of these elements 对体系关键要素的实验研究系统，如燃烧过程实验研究系统、燃烧稳定性实验研究系统、喷管实验研究系统、热传导及冷却实验研究系统等进行了论证，确定了上述要素的建设方案。
